// 实现一个翻译服务器，客户端发来一个英语单词，返回一个汉语词典

#include <muduo/net/TcpServer.h>
#include <muduo/net/EventLoop.h>
#include <muduo/net/TcpConnection.h>
#include <muduo/net/Buffer.h>
#include <iostream>
#include <string>
#include <unordered_map>

class DictServer
{
public:
    DictServer(int port)
        : _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port), "DictServer", muduo::net::TcpServer::kReusePort)
    {
        //设置连接事件（连接建立/管理）的回调
        _server.setConnectionCallback(std::bind(&DictServer::onConnection, this, std::placeholders::_1));
        //设置连接消息的回调
        _server.setMessageCallback(std::bind(&DictServer::onMessage, this, 
                                    std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
    }

    void start()
    {
        _server.start(); //先开始监听
        _baseloop.loop();//开始死循环执行事件监控
    }

private:
    void onConnection(const muduo::net::TcpConnectionPtr &conn)
    {
        if (conn->connected())
            std::cout << "连接建立!\n";
        else
            std::cout << "连接断开!\n";
    }
    void onMessage(const muduo::net::TcpConnectionPtr &conn, muduo::net::Buffer *buf, muduo::Timestamp)
    {
        static std::unordered_map<std::string, std::string> dict_map = {
            {"hello", "你好"},
            {"world", "世界"},
            {"bite", "比特"}};
        std::string msg = buf->retrieveAllAsString();
        std::string res;
        auto it = dict_map.find(msg);
        if (it != dict_map.end())
        {
            res = it->second;
        }
        else
        {
            res = "未知单词";
        }
        conn->send(res);
    }

private:
    muduo::net::EventLoop _baseloop;
    muduo::net::TcpServer _server;
};


int main()
{
    DictServer server(9090);
    server.start();

    return 0;
}